1st, check the ground terminals at G101 (see pic-note tht the TCM is grounded here.). Check for evidence of corrosion and security of the nuts. If corrosion is suspected, remove the nuts and clean the terminal ends and reassemble with a light coat of "Tune Up Grease" on the terminals. Torque the nuts to 110 in./lbs. Make sure the wires are not chaffing on the coil mount.
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Next, make sure the harness connector on the TCM is secure. If you are inclined, remove the connector and inspect the pins and cavities for corrosion (black stuff). Clean with CRC Electronic Cleaner and reassemble carefully. Give the harness wires a gentle wiggle for good measure.
See if there are any other pending codes using a scanner. Erase/delete P1698.
Check back.
Next, make sure the harness connector on the TCM is secure. If you are inclined, remove the connector and inspect the pins and cavities for corrosion (black stuff). Clean with CRC Electronic Cleaner and reassemble carefully. Give the harness wires a gentle wiggle for good measure.
See if there are any other pending codes using a scanner. Erase/delete P1698.
Check back.
